Juice-straining system for sugar-cane mills



May 3 1927.

W. G. HALL JUICE STRAINING SYSTEM FOR SUGAR CANE MILLS Filed Jan. 29, 1926 6! Not many;

Patented May 3, 1927.

UNITED STATES:

' WILLIAM HALL, 'OF I IONOLULU, TERRITORY OF I-I A\Kl'AQlITlI.

JUICE-STBAINING SYSTEM FQR SUGAR-CANE MILLS.

Application filed January 29, 1926. Serial No. 84,658.

The invention relates to a juice straining system for sugar cane mills and has for its object to provide a simple and effective straining apparatus, preferably located in the bottom of the boot of the conveyor between the crusher and the shredder of a standard mill, the strainer discharging the clear juice into a receptacle, wh ch, 111 turn,

is connected by suitable piping for delivering the nice directly to the boiling house.

The invention is illustrated in the accom panying drawing, in which The figure is a diagrammatic side elevation of a standard mill showing the means for delivering the mixed juice from the several roller units, as well the juice ex.- pressed by the crusher, directly to the strainer.

Reterring to the drawing, 1, indicates a standard crusher for crushing or breaking cane, which is then carried by an endless flight conveyer 3 to a shredder (3 whence it is delivered by a coi'iveyer 7 to the first roller unit 10 of the mill train. As indicated, there are four roller units 10,110, 10 and 10, successively connected by intermediate conveyers 20, and 20 Each of the roller mill units discharges the expressed juice into the pan 11, 11, 11 and 11 respectively. The pans '11 and 11' below the first and second roller units are connected by discharge pipes '12 and 12 to the pump 13, which, in turn, is provided with a single discharge pipel i. The pans 11 and 11, below the third and fourth mills, are connected by pipes 12 and 12 with'the pump 13, whichlatter is provided with two discharge pipes, the first of vwhich 14L dis charges the juice into a maceration distributor 15 located above the first intermediate conveyer 20 and discharge pipe 14 delivers the juice into a similar maceration distributor 15 above the intermediate conveyer 20. A suitable water distributing pipe is located above the last intermediate conveyer 20 for supplying the necessary maceration to the bagasse on said intermediate conveyen' By this particular. arrangement for distributing the juice expressed by the several roller units,which is generally known as mixed juice, the latter is ultimately received by pump 13 and delivered by discharge pipe 14 leading from said pump and it is the purpose of this invention to provide an effective straining de vice for removing the cush cush and other solid material from the mixed juice, and at the same time elfectivelystraining the larger proportion of the juice, which is expressed from the cane by the crusher 1. In o-r der to effect these desired results,rthe boot or closed casing 2 of the conveyer- 3 interposed between the crusher 1 and the shredder 6 1S provided at its lower end with a screen 26, which conforms generally to the shape of the bottom or lower section of the bootand is engaged by the slats or scraper elements usually associated with the conveyer Secured to or forming a part of the boot [or casing of the conveyer adjacent screen 26 is receptacle 27 into which the juice passing through the screen is discharged, which receptacle isprovided with an outlet 28 adapted to be connected with piping leading to the boiling house. The discharge pipe 14 of pump 13 is also connected with the lower end of the boot ot-the conveyer 3 and discharges the mixed juice directly into conveyer flight, so that the openings in the screen are maintained free and unobstructed. All of the strained juice passes directly into the chamber 27 whence it is delivered pra'c tically freefrom all solid matter by way of the discharge 28 to the boiling house.

By means of this relatively simple, but highly effective screening arrangement, all of' the juice extracted from the mill is immediately strained and delivered to the boiling house and is not subjected to danger of inversionor contamination, such as is likely to occur with the more complicated strainer devices heretofore employed.

What I claim is: e

1. The combination of a sugar cane mill including a preliminary crusher and an elevating conveyor having a casing for delivering the cane from the crusher to the first mill unit, a strainer in the bottom of the casing, a

receptacle into which the strainer disunit; comprising a strainer in the bottom of said boot, a receptacle into which the 10 strainer discharges, and means for delivering the mixed juice from the several mill units-t0 said boot above the strainer.

In testimony whereof I afiix .my signature.

,W-IliLmM e. HALL. 

